J2ME程序：手动设置URL主机地址和端口，连接主机，运用DATAINPUTSTREAM传输和响应请求。有效代码供参考，实际应用需要搭配wifi设备作为主机响应请求。-J2ME procedures: URL manually set the host address and port to connect the host, using DATAINPUTSTREAM transmission and responding to requests. Effective code for ref